adjust to masking option

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43483 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.surf.bspline/main.c

@@ -646,7 +646,7 @@ int main(int argc, char *argv[])
 			    subregion_row, subregion_col);
 		    raster_matrix =
 			P_Regular_Points(&elaboration_reg, &original_reg, general_box,
-					 overlap_box, raster_matrix, parVect,
+					 overlap_box, raster_matrix, NULL, parVect,
 					 stepN, stepE, dims.overlap, mean,
 					 nsplx, nsply, nrows, ncols, bilin);
 		}